The 2 black ones in the back (visible) and the 2 silver ones deep in the handle are all you need to split the case open.

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I know. Is there any easy way to get to the screws beneath the handle? I have the Torx bit, I just don't have something long enough to reach down there.

Edit: I finally got it open and it isn't as dusty as I thought. I'll have to be careful cleaning though, 10,000 volts going though my body doesn't sound pleasant for me or my SE.